Hi Prasad,
What is your SRM implementation scenarios: Extended Classic/Classic ?
Scenario - ECS
SC creation would not trigger an RFC call to the ECC system as it does not create a PR.
- It would either be in pending approval status or approved and get converted in to a PO
- To debug in such case, put an "EXTERNAL" break-point in the BADI "BBP_DOC_CHANGE_BADI" and check the stack to to see the program where you would have to put the break-point.
Scenario - Classic
I believe, RFC to ECC would happen after the SC is approved to create a PR, so please check if the status of the SC after its created and put an external break-point int he same BADI.
Also, you might try using the FBGENDAT parameter in the BAPI which would be called in ECC system to create the follow-on document (PR/PO) based on your system settings.
Please check with your functional team regarding the existing setup.
Br,
Raghu